I compared the player edge at each true count (Hi Lo vs Halves)

TC.....Hi Lo:.....Halves:
-1.5..-1.41%....-1.37%
-1..... -1.14%...-1.17%
-0.5...-0.91%...-0.91%
0.......-0.57%...-0.54%
+0.5..-0.19%...-0.19%
+1....+0.11%...-0.03% **
+1.5..+0.32%..+0.40%
+2.....+0.64%..+0.73%
+2.5..+0.93%..+0.76% **
+3.....+1.23%..+1.09% **

Game is 6D H17 das da2, 5 decks dealt

Rate/100H:
hi lo +$113 with $123 average bet
Halves +$124 with $121 average bet

Obviously halves is the better count, but...

Why are the halves edge% per TC worse (usually) than the hi lo numbers?

Does halves just outperform way more in the higher true counts? It looks like hi lo would be better when looking at edge % per TC